/* zutil.h -- internal interface and configuration of the compression library

 * Copyright (C) 1995-2024 Jean-loup Gailly, Mark Adler

 * For conditions of distribution and use, see copyright notice in zlib.h

 */

/* WARNING: this file should *not* be used by applications. It is

   part of the implementation of the compression library and is

   subject to change. Applications should only use zlib.h.

 */

/* @(#) $Id$ */

#ifndef ZUTIL_H

#define ZUTIL_H

#ifdef HAVE_HIDDEN

#  define ZLIB_INTERNAL __attribute__((visibility ("hidden")))

#else

#  define ZLIB_INTERNAL

#endif

#include "zlib.h"

#if defined(STDC) && !defined(Z_SOLO)

#  if !(defined(_WIN32_WCE) && defined(_MSC_VER))

#    include <stddef.h>

#  endif

#  include <string.h>

#  include <stdlib.h>

#endif

#ifndef local

#  define local static

#endif

/* since "static" is used to mean two completely different things in C, we

   define "local" for the non-static meaning of "static", for readability

   (compile with -Dlocal if your debugger can't find static symbols) */

typedef unsigned char  uch;

typedef uch FAR uchf;

typedef unsigned short ush;

typedef ush FAR ushf;

typedef unsigned long  ulg;

#if !defined(Z_U8) && !defined(Z_SOLO) && defined(STDC)

#  include <limits.h>

#  if (ULONG_MAX == 0xffffffffffffffff)

#    define Z_U8 unsigned long

#  elif (ULLONG_MAX == 0xffffffffffffffff)

#    define Z_U8 unsigned long long

#  elif (UINT_MAX == 0xffffffffffffffff)

#    define Z_U8 unsigned

#  endif

#endif

extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */

/* (size given to avoid silly warnings with Visual C++) */

#define ERR_MSG(err) z_errmsg[(err) < -6 || (err) > 2 ? 9 : 2 - (err)]

#define ERR_RETURN(strm,err) \

  return (strm->msg = ERR_MSG(err), (err))

/* To be used only when the state is known to be valid */

        /* common constants */

#ifndef DEF_WBITS

#  define DEF_WBITS MAX_WBITS

#endif

/* default windowBits for decompression. MAX_WBITS is for compression only */

#if MAX_MEM_LEVEL >= 8

#  define DEF_MEM_LEVEL 8

#else

#  define DEF_MEM_LEVEL  MAX_MEM_LEVEL

#endif

/* default memLevel */

#define STORED_BLOCK 0

#define STATIC_TREES 1

#define DYN_TREES    2

/* The three kinds of block type */

#define MIN_MATCH  3

#define MAX_MATCH  258

/* The minimum and maximum match lengths */

#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */

        /* target dependencies */

#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))

#  define OS_CODE  0x00

#  ifndef Z_SOLO

#    if defined(__TURBOC__) || defined(__BORLANDC__)

#      if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))

         /* Allow compilation with ANSI keywords only enabled */

         void _Cdecl farfree( void *block );

         void *_Cdecl farmalloc( unsigned long nbytes );

#      else

#        include <alloc.h>

#      endif

#    else /* MSC or DJGPP */

#      include <malloc.h>

#    endif

#  endif

#endif

#ifdef AMIGA

#  define OS_CODE  1

#endif

#if defined(VAXC) || defined(VMS)

#  define OS_CODE  2

#  define F_OPEN(name, mode) \

     fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")

#endif

#ifdef __370__

#  if __TARGET_LIB__ < 0x20000000

#    define OS_CODE 4

#  elif __TARGET_LIB__ < 0x40000000

#    define OS_CODE 11

#  else

#    define OS_CODE 8

#  endif

#endif

#if defined(ATARI) || defined(atarist)

#  define OS_CODE  5

#endif

#ifdef OS2

#  define OS_CODE  6

#  if defined(M_I86) && !defined(Z_SOLO)

#    include <malloc.h>

#  endif

#endif

#if defined(MACOS)

#  define OS_CODE  7

#endif

#ifdef __acorn

#  define OS_CODE 13

#endif

#if defined(WIN32) && !defined(__CYGWIN__)

#  define OS_CODE  10

#endif

#ifdef _BEOS_

#  define OS_CODE  16

#endif

#ifdef __TOS_OS400__

#  define OS_CODE 18

#endif

#ifdef __APPLE__

#  define OS_CODE 19

#endif

#if defined(__BORLANDC__) && !defined(MSDOS)

  #pragma warn -8004

  #pragma warn -8008

  #pragma warn -8066

#endif

/* provide prototypes for these when building zlib without LFS */

#if !defined(_WIN32) && \

    (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)

    ZEXTERN uLong ZEXPORT adler32_combine64(uLong, uLong, z_off_t);

    ZEXTERN uLong ZEXPORT crc32_combine64(uLong, uLong, z_off_t);

    ZEXTERN uLong ZEXPORT crc32_combine_gen64(z_off_t);

#endif

        /* common defaults */

#ifndef OS_CODE

#  define OS_CODE  3     /* assume Unix */

#endif

#ifndef F_OPEN

#  define F_OPEN(name, mode) fopen((name), (mode))

#endif

         /* functions */

#if defined(pyr) || defined(Z_SOLO)

#  define NO_MEMCPY

#endif

#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)

 /* Use our own functions for small and medium model with MSC <= 5.0.

  * You may have to use the same strategy for Borland C (untested).

  * The __SC__ check is for Symantec.

  */

#  define NO_MEMCPY

#endif

#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)

#  define HAVE_MEMCPY

#endif

#ifdef HAVE_MEMCPY

#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */

#    define zmemcpy _fmemcpy

#    define zmemcmp _fmemcmp

#    define zmemzero(dest, len) _fmemset(dest, 0, len)

#  else

#    define zmemcpy memcpy

#    define zmemcmp memcmp

#    define zmemzero(dest, len) memset(dest, 0, len)

#  endif

#else

   void ZLIB_INTERNAL zmemcpy(Bytef* dest, const Bytef* source, uInt len);

   int ZLIB_INTERNAL zmemcmp(const Bytef* s1, const Bytef* s2, uInt len);

   void ZLIB_INTERNAL zmemzero(Bytef* dest, uInt len);

#endif

/* Diagnostic functions */

#ifdef ZLIB_DEBUG

#  include <stdio.h>

   extern int ZLIB_INTERNAL z_verbose;

   extern void ZLIB_INTERNAL z_error(char *m);

#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}

#  define Trace(x) {if (z_verbose>=0) fprintf x ;}

#  define Tracev(x) {if (z_verbose>0) fprintf x ;}

#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}

#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}

#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}

#else

#  define Assert(cond,msg)

#  define Trace(x)

#  define Tracev(x)

#  define Tracevv(x)

#  define Tracec(c,x)

#  define Tracecv(c,x)

#endif

#ifndef Z_SOLO

   voidpf ZLIB_INTERNAL zcalloc(voidpf opaque, unsigned items,

                                unsigned size);

   void ZLIB_INTERNAL zcfree(voidpf opaque, voidpf ptr);

#endif

#define ZALLOC(strm, items, size) \

           (*((strm)->zalloc))((strm)->opaque, (items), (size))

#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))

#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}

/* Reverse the bytes in a 32-bit value */

#define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \

                    (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))

#endif /* ZUTIL_H */